Is a hamster streamline?

there is a big difference between them as syrian hamsters are bigger than dwarf hamsters. There is quite a lot of different types of dwarf hamsters such as, Russian winter whites, Chinese, campbells,...

on a scale a hamster usually have up to 4 or 5 babies

Yes, she will have baby hamsters, but only if she mates with a male hamster.

Prolonged use might, but in general, no, to the hamster it's little different to running around freely.

it is a very good idea t because the babes are much smaller than the other hamster if u don't separate them from other hamsters its a good chance they might eat them. but u don't have to separate...